Re: [dbus-cplusplus-devel] dispatcher timeout

[Rafal D. <r....@ke...>]

Here is a snippet of code from my application, This code is for periodic check if connection is alive
You need to install DBus::DefaultTimeout (dt is pointer to this object) with DBus::BusDispatcher (dispatcher object)
BTW framework is responsible for releasing dt memory (see internals of DBus::Callback_Base) 

bool const repeat=true;
unsigned const timeout_ms = 3 * DEFAULT_TIMEOUT_MS;//DSP uses 10000 for Ping->Pong messages
DBus::DefaultTimeout*const dt = new DBus::DefaultTimeout(timeout_ms, repeat, &dispatcher);
dt->expired=new periodic();


periodic is a class which does processing on timeout:


class periodic: public DBus::Callback_Base<void, DBus::DefaultTimeout &> {
public:
	void call(DBus::DefaultTimeout & param) const {
		if( not ping_was_called.read_reset() ) {
			LWAR_ << "TIMEOUT: CLOSING THE CONNECTION " << blackfin << " last Ping received long time ago";
			::close( blackfin );
			g_devices->invalidate();//Reset DBus collections - no connection with devices
			g_blocks->invalidate();
		}
	}
};


-----Original Message-----
From: Theodore A. Roth [mailto:ta...@gm...]
Sent: Fri 12/3/2010 11:23 PM
To: dbu...@li...
Subject: [dbus-cplusplus-devel] dispatcher timeout
 
I've been trying to figure out how to register a timeout callback with
the dispatcher so that my callback function will be invoked
periodically by the dispatcher main loop. The
BusDispatcher::add_timeout() method seems to take an internal timeout
object as an argument which leads me to believe that I can't use that.

I'm still in the learning dbus-c++ phase and my app is a rather simple
server based on the echo demo, but I've stripped it down to only a
Hello method and a single signal. My goal is to invoked the signal in
the timeout.

None of the examples in the source repo show how to do what I what,
and google hasn't been too helpful. If someone has a link to an
example of this, I would be most appreciative.

Thanks.

Ted Roth

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